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unit Test7;
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{$mode objfpc}{$H+}
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{$codepage utf8}
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{Test 7: Create and read back an Array}
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{
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1. Create an empty database and populate with a single table including an array of integer column.
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2. Select all and show metadata including array metadata.
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3. Insert a row but leave array null
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4. Show result.
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5. Update row with a populated array and show results.
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7. Reopen cursor but before fetching array, shrink bounds
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8. Fetch and print array with reduced bounds.
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}
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interface
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uses
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Classes, SysUtils, TestManager, IB;
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type
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{ TTest7 }
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TTest7 = class(TTestBase)
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private
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procedure UpdateDatabase(Attachment: IAttachment);
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public
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function TestTitle: string; override;
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procedure RunTest(CharSet: string; SQLDialect: integer); override;
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end;
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implementation
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const
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sqlCreateTable =
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'Create Table TestData ('+
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'RowID Integer not null,'+
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'Title VarChar(32) Character Set UTF8,'+
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'Dated TIMESTAMP, '+
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'Notes VarChar(64) Character Set ISO8859_1,'+
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'MyArray Integer [0:16],'+
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'Primary Key(RowID)'+
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')';
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sqlInsert = 'Insert into TestData(RowID,Title,Dated,Notes) Values(:RowID,:Title,:Dated,:Notes)';
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sqlUpdate = 'Update TestData Set MyArray = :MyArray Where RowID = 1';
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{ TTest7 }
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procedure TTest7.UpdateDatabase(Attachment: IAttachment);
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var Transaction: ITransaction;
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Statement: IStatement;
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ResultSet: IResultSet;
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i,j: integer;
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ar: IArray;
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begin
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Transaction := Attachment.StartTransaction([isc_tpb_write,isc_tpb_nowait,isc_tpb_concurrency],taCommit);
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Statement := Attachment.Prepare(Transaction,'Select * from TestData');
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PrintMetaData(Statement.GetMetaData);
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Statement := Attachment.PrepareWithNamedParameters(Transaction,sqlInsert);
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ParamInfo(Statement.GetSQLParams);
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with Statement.GetSQLParams do
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begin
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for i := 0 to GetCount - 1 do
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writeln(OutFile,'Param Name = ',Params[i].getName);
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ByName('rowid').AsInteger := 1;
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ByName('title').AsString := 'Blob Test ©€';
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ByName('Notes').AsString := 'Écoute moi';
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ByName('Dated').AsDateTime := EncodeDate(2016,4,1) + EncodeTime(9,30,0,100);
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end;
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Statement.Execute;
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Statement := Attachment.Prepare(Transaction,'Select * from TestData');
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ReportResults(Statement);
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Statement := Attachment.PrepareWithNamedParameters(Transaction,sqlUpdate);
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ParamInfo(Statement.GetSQLParams);
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Transaction.CommitRetaining;
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ar := Attachment.CreateArray(Transaction,'TestData','MyArray');
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j := 100;
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for i := 0 to 16 do
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begin
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ar.SetAsInteger([i],j);
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dec(j);
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end;
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Statement.SQLParams[0].AsArray := ar;
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Statement.Execute;
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Statement := Attachment.Prepare(Transaction,'Select * from TestData');
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ReportResults(Statement);
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ResultSet := Statement.OpenCursor;
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if Resultset.FetchNext then
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begin
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ar := ResultSet.ByName('MyArray').AsArray;
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ar.SetBounds(0,10,2);
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writeln(OutFile,'Shrink to 2:10');
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WriteArray(ar);
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end
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else
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writeln(OutFile,'Unable to reopen cursor');
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{Now update the reduced slice}
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writeln(OutFile,'Write updated reduced slice');
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ar.SetAsInteger([2],1000);
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Statement := Attachment.PrepareWithNamedParameters(Transaction,sqlUpdate);
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Statement.SQLParams[0].AsArray := ar;
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Statement.Execute;
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writeln(OutFile,'Show update array');
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Statement := Attachment.Prepare(Transaction,'Select * from TestData');
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ReportResults(Statement);
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Transaction.Commit;
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end;
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function TTest7.TestTitle: string;
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begin
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Result := 'Test 7: Create and read back an Array';
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end;
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procedure TTest7.RunTest(CharSet: string; SQLDialect: integer);
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var DPB: IDPB;
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Attachment: IAttachment;
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begin
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DPB := FirebirdAPI.AllocateDPB;
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DPB.Add(isc_dpb_user_name).setAsString(Owner.GetUserName);
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DPB.Add(isc_dpb_password).setAsString(Owner.GetPassword);
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DPB.Add(isc_dpb_lc_ctype).setAsString(CharSet);
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DPB.Add(isc_dpb_set_db_SQL_dialect).setAsByte(SQLDialect);
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Attachment := FirebirdAPI.CreateDatabase(Owner.GetNewDatabaseName,DPB);
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Attachment.ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_consistency],sqlCreateTable);
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UpdateDatabase(Attachment);
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Attachment.DropDatabase;
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end;
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initialization
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RegisterTest(TTest7);
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end.
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